Toshiba m2 died

[Gokhann]

Picture 5

Attachments

[fzabkar]

https://www.ti.com/packaging/en/docs/partlookup.tsp?partmarking=cbz

[fzabkar]

GU = DZ2J068 / DZ2S068 = 6.8V Zener for constant voltage / surge absorption circuit:

https://www.mouser.com/datasheet/2/315/DZ2J06800L_E-1142209.pdf
https://docs.rs-online.com/7c3e/0900766b80e4a742.pdf

[Gokhann]

So you found that broken ic? Wow how? That makes sense since i cant measure anything on components

That broken IC probably has nothing to do with the root cause.

Is there a short between 3.3Vin and Ground?

What to you think can be, if there is no short between 3V and GND?

[Lardman]

What to you think can be, if there is no short between 3V and GND?

The angry pixies are not where they are supposed to be - put the thermal camera down and start tracing the pixie path from the 3.3v input until they disappear.

[fzabkar]

What to you think can be, if there is no short between 3V and GND?

I don't have a crystal ball.

What are the voltages at the input and output of the current limit switch? (ZSA0)

What are the voltages at each of the inductors adjacent to the PMIC? (RT5045A)

[Gokhann]

What to you think can be, if there is no short between 3V and GND?

The angry pixies are not where they are supposed to be - put the thermal camera down and start tracing the pixie path from the 3.3v input until they disappear.

Weird thing is, that i cant measure anything. I place the black probe on the usb c socket and tried to measure all over the m2 disk, nothing to measure. but if i swap it with my own m2, every thing works

[fzabkar]

What to you think can be, if there is no short between 3V and GND?

The angry pixies are not where they are supposed to be - put the thermal camera down and start tracing the pixie path from the 3.3v input until they disappear. :roll:

Weird thing is, that i cant measure anything. I place the black probe on the usb c socket and tried to measure all over the m2 disk, nothing to measure. but if i swap it with my own m2, every thing works

Can you at least measure the 3.3V input? If not, then where is the 35.1C temperature coming from?

Is your own SSD the same model?

[Gokhann]

i guess the 35 deg is from my enclosure. the 3.3V seems to be underneath the (bottom side of the pcb).

I will try to remasure it now.

No mine is from intel. the broken one is from toshiba

[Gokhann]

i tried to track the 3.3V and i just cant find it any voltages on pcb, now i wonder if my multimeter is playing with me.
I have fluke i can borrow tomorrow. i will remeasure tomorrow

[fzabkar]

Measure the voltage of a CR2032 lithium coin cell like the one on your motherboard.

[fzabkar]

Measure Vin and Vout of IC "ZSA0".

Attachments

[Gokhann]

Usb c kabel were bad. I changed the cabel now the m2 ssd gets hot.

Here is a pic

Attachments

[Gokhann]

Measure Vin and Vout of IC "ZSA0".

Vin and Vout is 3.2V.
The m2 adapter tries to start up but since there is a malfunction it start and stop every 5 sec. so the vin and vout voltages toggles between 3.2V and 2~.
its just a value, i think it starts so quickly up again , so the 2something volt is not important.

A ram chip gets hot, but im not sure if anything cause it. hard to feel.

[fzabkar]

Measure the resistances between ground and each of the inductors at the PMIC. One of the outputs could be overloaded.

[Gokhann]

Measure the resistances between ground and each of the inductors at the PMIC. One of the outputs could be overloaded.

Maesured compard to GND

77 K
0.268 K
4.8 K

Attachments

[fzabkar]

There are 3 more inductors, 2 below the PMIC and 1 at the bottom left corner.

If all those are OK, then measure the resistance between Vout and Ground for each of the load switches marked "24". Maybe that chipped load switch is actually faulty.

[Gokhann]

There are 3 more inductors, 2 below the PMIC and 1 at the bottom left corner.

If all those are OK, then measure the resistance between Vout and Ground for each of the load switches marked "24". Maybe that chipped load switch is actually faulty.

Attachments

Chip 24 , out to GND

Pmic inductor resistance to GND

[Gokhann]

Now i just wanted to measure the voltage all over, and there is no 3.3V haha. Damn, and its the working cable. so there is something wrong with it.

regarding the broken 24 chip, just for test purpose, dont you think i could short the in and out and see if the harddrive shows up on pc?

[fzabkar]

I can't see any obvious overloads. Could it be that your USB port has shut down? These ports are usually protected by resettable polyswitches or polyfuses.

https://i.stack.imgur.com/ISM4w.jpg

Many DR techs use a USB current/voltage monitor to measure the current draw of USB devices.

https://m.media-amazon.com/images/I/713ZajmsVyL._AC_UF894,1000_QL80_.jpg
https://m.media-amazon.com/images/I/71AwTaD37DL._AC_UF894,1000_QL80_.jpg

Last edited by fzabkar on January 2nd, 2024, 13:55, edited 1 time in total.